On a related note. It is not uncommon for Goldfish keepers to want to keep Cories in with Goldfish because the Cories are so appealing. Goldfish are not normally carnivores but as with any fish if something fits in their mouth it eventually will find its way in.

Goldfish occasionally will eat a Cory. Also occasionally a Cory will get stuck in the Goldys mouth when it locks it_________________wirehair

Marcos Avila
Oscars are predators...eating fish is what they do for a living, literally. It's in their genes. That's the moral of this story: put an oscar in a tank with a fish that has the slightest chance of going into the oscar's mouth, and sooner or later it will

There is humor to be found anywhere but to go over old ground may be worthwhile.

Any and all creatures have the urge to survive. It is not a question of intelligence but a basic need to live long enough. It is not a good idea to put different size fish in the same tank. While various critters may CO2-exist for extended periods of time disaster is always just around the bend.

I have seen siblings of the same size face off and one wins the other loses by being eaten. I cannot figure this one out but I have seen it happen so sometimes size is not the deciding factor. Sometimes being first or more aggressive denotes the survivor.

The essential point here is respect the critters and the smallness of aquaria. Mixing critters for our own aesthetic reasons can be fraught with peril and aggravation for the critters and us. Different species and sizes can work sometimes...sometimes not._________________wirehair

Marcos wrote "That's the moral of this story: put an oscar in a tank with a fish that has the slightest chance of going into the oscar's mouth, and sooner or later it will, possibly to the demise of both"

That being said and never having any Oscars myself, if the fish had been well fed would it still have eaten the pleco _________________Cathy_Andy
It's my cat's fault we're fish crazed!
I have come to realize there's more to fish keeping then "just add water and stir"

I'm sorry if this is offenses to anyone, it is not meant to! But still, I just had to have a good chuckle at that. I love fish when they surprise us like that. Although really, as Marcos has pointed out, it shouldn't be a surprise if you think about it. As much as we like to place our own human personalities on our fishy pets, they are what they are, a swimming organism which will do what it needs to survive. Its the same when fish jumps from the tank, its not commiting fish suicide, just doing what it thinks is the best way to improve the situation at the point in time. This Oscar was obviously just following his own natural instincts to use his big mouth for what it was made for . Makes you wonder what Oscars try out in the wild and come to a similar demise .

Phil _________________"Donald duck never wore pants, but when he gets out of a bath, he covers his waist with a towel...."

I have an aquarium that kept Oscar fishes together with other kinds of fishes. As the Oscar fishes gets older, they become wilder and start biting the other fishes including Hammer Head and Big Head fish and I have already lost a couple of the other fishes. I don't have anymore spaces to put a new aquarium to separate the fishes. What can I do? How to stop the Oscar fishes from biting other fishes? I do have a point outside the house, will the Oscar fishes survive if I put them outside?
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